Improvement in machines for refitting valves



WILLIAM w. ALLMAND, `or EAST BOSTON, MASSACHUSETTS.

`IMPR'QVE'MENT IN MACHINES FOR "REFITT-:IYNG VALVES.

Specication forming part-of kLetters Patent No. 146,633, dated January 20, T1874 application filed July 24, 1873.

To all whom it may concern.-

Be it known that I, WILLIAM W. ALLMAN-n, of East Boston, in the countyfof Suffolk and in the State of Massachusetts, have invented certain new and useful Improvements in Valvelteiitting -Machines; `and do .hereby `declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying' drawing making apart of this specication,in which- Figure 1 isa perspective view of my apparatus. Fig. 2 is an elevation of the inner side of the-head; and Fig. 3 is a plan view of lthe upper side of said apparatus as'arranged for dressing the tapering -plug of an ordinary cock, a portion of the head and of the back rest `being broken away, so as to lbetter show the position-of said plug.

y Letters' of like name and kind refer to like parts in each ofthe figures.

The object of my invention is to enable the plugsv and valves of water and -stearn-cocksto means employed for rotating the plug orvalve being operated upon, substantially as and for the purpose hereinafter shown. It consists, nally, in the device as a whole, when its several parts are constructed and combined to operate substantially as and for the purpose hereinafter shown and described.

-In the annexed drawing, A represents the Y bed-plate of the machine, consisting of a narrow strip of metal, having its upper corners grooved so as to form a V-shaped` slide, and provided at one end with a circular enlarget ment, A', from which extends upward a standard, B, that furnishes a support for a head, (l.

The rear end of the head C is cylindrical, while its front end is made bell-shaped, and is provided with a conical recess, C', which has an inward inclination of sides, that corresponds to the usual angles of the face of compression or globe valves. Within .one side of the head `C is provided a lslot, o, which extends horizontally and radially from near the `inner end of the recess C toa point inearits outerend, and contains a cutter, D, which, :outside 1of said cone, rests `Within a suitable way orguide, E, and lis moved inward or outward by `means of a screw, F. Within `thelrecess C', at equidistant points .from eachother and .from 4the slot o, are 1provided two .radial grooves, within which .are placed `corresponding strips of metal, c', that form bearings for .and upon which the faces of valves rest while `being operated upon. A Vscrew-center, yGr, passing finwardthrough the -`axis of the head, `completes the same. Fitting upon and `sliding over the bedplate A is a Vtail-stock,H,-wh1'ch :has :the forni shown in Fig. l, and 4is provided with a screwcenter, I', that passes ,inwardithrough the 4rear arm h of said stock, upon a line withthe axis,

of the .head C. Within 1the front arm is I.provided :a circular opening, `whichcoincides with the centers -G and I, .and furnishes ia `bearing for a corresponding bar, .theforward end of which -is provided with :a `screw-thread, k, and is made conical, .while its `rear end is squared, Fso .as to receive Va .ratchet-wheel, l, that is-operatedlogyT means of a lever, L, and pawl l', as incase` ofarratchet-drill. t o

As fthus constructed, 4.the device isvready1 for use in reltting ythe 1valvesof.globe .orcorn -pression cocks, said operation :being as `follows: The center G is withdrawn from therecess C', the valve placed within said recess, and the bar K placed against the outer end ot' the valve-stem, with the conical end of Said bar restingwithin the center opening of said stein. A dog, M, provided with two` binding-screws, m, (or .with projecting arms,) and screwed upon the threaded end k of said bar,

is now caused to engage with said valve-stem or with its hand-Wheel, and the tail-stock H is moved forward until the back center I can be caused to engage with the center opening in said bar, after which the ratchetlever is operated, so as to cause said `bar and valve to rotate. The cutter D is now moved inward until it engages with and cuts the face of the valve in the usual manner, the rear center being used as a means for feeding said valve forward, while the headcenter operates as a stop to prevent said Valve from moving suddenly forward in case said cutter runs into a soft place.

By means of the arrangement of the two bearings and of the cutter within the head, a

valve that is badly out of shape may be made perfectly round and true, while, if said valve were permitted to bear directly against the inner side of said head, its inequalities would be perpetuated and the cutter caused to chatter, so as to produce an uneven surface.

For use in retitting the tapering plugs of ordinary cocks, a plug, N, is suspended upon the head-center G and the' pointed end of the bar K, so as to be capable of rotation, as in an ordinary lathe. The dog M being attached to the squared end of said plug, the latter and said bar may be rotated by means of the ratchet-lever. rIwo jam-nuts, g and z', respectively, are placed upon the screw-centers G and I, and, when said centers are adjusted to relative position, are employed for locking them in place. Upon the bed-plate A, immediately in front of the head C, is secured across slide or way, O, upon which are placed two square posts, I) and Q, that are capable of being adjusted transversely toward or from the center of the machine, and, when so adjusted, secured in place. Within the upper end of the rear post lJ is pivoted a block, P, which is provided within its forward side with a V-shaped groove, p, the-center of which is exactly in aline vertically with the centers of the machine. rIhe block P', being pivoted within its post, is adjust-ed horizontally, so as to bring its groove p in a line parallelto the rear side of the plug N, after which said block is secured in position and the post I moved forward until said grooved block bears iirmly against said plug and forms for the latter a back rest. Within the forward post Q is, in a like manner, pivoted a block, Q', within the upper side of which is formed a slide or bearing for a cutter, q, which cutter is moved toward or from the center of the machine by means of a hand-screw, q. The block Q is now adjusted so as to bring the inner or cutting edge of the tool q in a line with the forward side ofthe plug N, after which the `post Q is movedforward until said tool nearly touches said plug, and is then secured in place. by means of the ratchet-lever, the cutter is fed inward and the surface of said plug cut away in the usual manner.

The machine thus constructed is simple, ef-

cient, and durable, and can beniade to produce results heretofore unattainable except by the use of the expensive power machinery em-u. ployed in the construction ot' valves and cocks,l

the co-operative action ofthe several parts being such as to render perfect hand-Work a comparatively easy matter.

ter in place of the usual screw-tap lever and the pressure of the hand against the cutter, when the machine is used for dressing the.' valvesof globe-cocks, lprevents all chattering of the cutters, and enables the device to be used in places Where otherwise no hand-'machine could be operated.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1. As an improvementin valve-relitting machines, the bearing-strips c', iitted into the j conical recess C of the head C, and arranged within the same at points equidistant from each other and from the cutter D, substantially as and for the purpose specified.

2. The frame A,.head C and C,-tailstock H, centers G and I, bar K, provided with the squared end la, andthe'ratchet L, I, and l, when constructed and combined to operate substantially as and for the purpose shown.'

3. The improved machine hereinbefore described as a whole, when its several parts are constructed and combined to operate substantially as and for the purpose shown and de# The plug being now rotated The employment` of a ratchet'lever and of a Xed'pressure-cenl, 

